﻿using System;
using System.Runtime.InteropServices;

using Storm.TextEditor.Win32.Structs;

namespace Storm.TextEditor.Win32
{
    public delegate int FONTENUMPROC(ENUMLOGFONTEX f, int lpntme,
                                 int FontType, int lParam);

    public static class NativeGdi32Api
    {
        [DllImport("gdi32.dll")]
        public static extern int SetDIBits(IntPtr hdc, IntPtr hBitmap,
                                           int nStartScan, int nNumScans,
                                           IntPtr lpBits, IntPtr lpBI,
                                           int wUsage);

        [DllImport("gdi32.dll")]
        public static extern int SetDIBitsToDevice(IntPtr hdc, int x, int y,
                                                   int dx, int dy, int SrcX, int SrcY,
                                                   int Scan, int NumScans, IntPtr Bits,
                                                   IntPtr BitsInfo, int wUsage);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateDIBSection(IntPtr hdc, IntPtr pBitmapInfo,
                                                     int un, IntPtr lplpVoid,
                                                     IntPtr handle, int dw);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern int SetPixel(IntPtr hdc, int x, int y, int crColor);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPixel(IntPtr hdc, int x, int y);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern int CombineRgn(IntPtr dest, IntPtr src1,
                                            IntPtr src2, int flags);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr CreateBrushIndirect(ref LOGBRUSH brush);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr CreateRectRgnIndirect(ref RECTAPI rect);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern int GetClipBox(IntPtr hDC, ref RECTAPI rectBox);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern bool PatBlt(IntPtr hDC, int x, int y, int width,
                                         int height, uint flags);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto)]
        public static extern int SelectClipRgn(IntPtr hDC, IntPtr hRgn);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr MoveToEx(IntPtr hDC, int x, int y,
                                             ref POINTAPI lpPoint);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr LineTo(IntPtr hDC, int x, int y);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreatePen(int nPenStyle, int nWidth, int crColor);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern int SetBrushOrgEx(IntPtr hDC, int x, int y, ref POINTAPI p);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreatePatternBrush(IntPtr hBMP);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern int GetTextFace(IntPtr hDC, int nCount, string lpFacename);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern int GetTextMetrics(IntPtr hDC, ref GDITextMetric TextMetric);

        [DllImport("gdi32.dll", CharSet = CharSet.Ansi, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreateFontIndirect([MarshalAs
            (UnmanagedType.LPStruct)]LogFont LogFont);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int BitBlt(IntPtr hDestDC, int x, int y, int nWidth,
                                        int nHeight, IntPtr hSrcDC, int xSrc,
                                        int ySrc, int dwRop);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreateSolidBrush(int crColor);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern int Rectangle(IntPtr hDC, int left, int top,
                                           int right, int bottom);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreateHatchBrush(int Style, int crColor);


        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,
                                                           int nHeight);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr DeleteObject(IntPtr hObject);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int GetTextColor(IntPtr hDC);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int SetTextColor(IntPtr hDC, int crColor);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int GetBkColor(IntPtr hDC);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int GetBkMode(IntPtr hDC);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern IntPtr DeleteDC(IntPtr hDC);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int SetBkColor(IntPtr hDC, int crColor);

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Auto,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int SetBkMode(IntPtr hDC, int Mode);

        [DllImport("gdi32.dll", CharSet = CharSet.Auto, CallingConvention =
            CallingConvention.StdCall, SetLastError = true)]
        public static extern int GdiFlush();

        [DllImport("gdi32.dll", SetLastError = true, CharSet = CharSet.Ansi,
            CallingConvention = CallingConvention.StdCall)]
        public static extern int EnumFontFamiliesEx(IntPtr hDC, [MarshalAs
                    (UnmanagedType.LPStruct)] LogFont lf,
                  FONTENUMPROC proc, Int64 LParam, Int64 DW);

        [DllImport("gdi32.dll", EntryPoint = "GdiAlphaBlend")]
        public static extern bool AlphaBlend(
          IntPtr hdcDest,              // Handle to destination DC.
          int nXOriginDest,            // X-coord of upper-left corner.
          int nYOriginDest,            // Y-coord of upper-left corner.
          int nWidthDest,              // Destination width.
          int nHeightDest,             // Destination height.
          IntPtr hdcSrc,               // Handle to source DC.
          int nXOriginSrc,             // X-coord of upper-left corner.
          int nYOriginSrc,             // Y-coord of upper-left corner.
          int nWidthSrc,               // Source width.
          int nHeightSrc,              // Source height.
          BLENDFUNCTION blendFunction  // Alpha-blending function.
        );
    }
}
